前两天知道了怎么不用插件整合CDN静态资源加速，今天就为大家分享纯代码实现整合WordPress与CDN加速服务。
在 WordPress主题目录下的 functions.php 文件中，加入以下代码实现替换功能：
//静态文件CDN加速
if ( !is_admin() ) {
add_action(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’wp_loaded\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’,\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’yuncai_ob_start\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’);
function yuncai_ob_start() {
ob_start(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’yuncai_qiniu_cdn_replace\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’);
}
function yuncai_qiniu_cdn_replace($html){
$local_host = \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’博客域名\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’; //博客域名
$qiniu_host = \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’CDN加速域名\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’; //CDN域名
$cdn_exts = \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’css|js|jpg|jpg|jpeg|gif|ico\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’; //扩展名（使用|分隔）
$cdn_dirs = \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’wp-content|wp-includes\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’; //目录（使用|分隔）
$cdn_dirs = str_replace(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’-\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\-\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, $cdn_dirs);
if ($cdn_dirs) {
$regex = \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’/\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ . str_replace(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’/\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\/\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, $local_host) . \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\/((\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ . $cdn_dirs . \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’)\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\/[^\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\s\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\?\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\;\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\>\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\<]{1,}.(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ . $cdn_exts . \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’))([\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\s\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\?]{1})/\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’;
$html = preg_replace($regex, $qiniu_host . \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’/$1$4\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, $html);
} else {
$regex = \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’/\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ . str_replace(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’/\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\/\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, $local_host) . \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\/([^\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\s\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\?\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\;\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\>\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\<]{1,}.(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ . $cdn_exts . \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’))([\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\s\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\?]{1})/\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’;
$html = preg_replace($regex, $qiniu_host . \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’/$1$3\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, $html);
}
return $html;
}
}
简单的一段代码，就能让你的 WordPress 实现静态文件 CDN 加速。当然，如果你的需求还包括加速远程图片或刷新缓存等，那么还是老老实实安装插件吧！